The answer s b because the rest was spent on music books and travel books
A division expression is when both the dividend and divisor are integer
Y=k/x²; substitute x=1 and y=1/8: 1/8=k. So y=1/(8x²)
When x=5, y=1/(8×25)=1/200.
Increasing by N% means the new value is 1+N/100 as much as the old value. So, we have
new = old*(1+1)(1+1.5) = 5.00 * old
so, old = new/5 or 20%
